I actually used to do that when my kids were younger as well. I just put it on the highest shelf of the closet in my bedroom. Worked well till they got older. My boys are actually pretty responsible and know they do not touch the guns unless I am around. But they are still kids and prone to knuckle-head moments...
My real concern is my sons' friends. A lot of kids show up in my home at different times. It is peer pressure and the wanting to show them something 'cool' that pushed me to getting a real gun safe and now an easily accessible (to me) pistol safe.

